Better if you park it on shore....
If the bay is really still, no waves, the wind is quiet, there is no wake, and you take a piece of bungee around the shrouds to make the mast less likely to move and flop around, then my suggestion is maybe.
However, can you guarantee that the wind will be still and that Ms. Getaway will not bounce around in the swells?
If she does, you will end up damaging her rigging.
And I'm sure you'd rather enjoy your sailing.....so your choice.
1989 Hobie SX18 Sail # 1947
'Only two things are infinite, the universe, and human stupidity. But I'm not sure about the former.'